Shaker shoe for grain threshers



Feh 39, W46.

T. CARROLL SHAKER SHOE FOR GRAIN THRESHERS Filed March 22 IN V EN TOR. ZF/OMAS Owe 0L L AT TOQ HEY Patented Feb. 19, 1946 SHAKER SHOE FQR GRAIN THRESHERS Thomas CarrollQToronto, Ontario, Canada, as-

signor to Massey-Harris Co. Ltd., Toronto,

Ontario, Canada, a corporation of Canada Application 'March 22, 1943, Serial No. 480,031

.4 Claims.

The present invention relates to shaker shoes for combines and threshing machines and has for its object to provide a device which ismore efficient, easier to' keep in adjustment and. can be manufactured at lower cost than conventional devices of the class.

One of the objects of the present invention is to provide a design wherein a Single blower fan having an adjustable valve may be used in combination with a single shaker shoe which will operate more efficiently than a main shoe and a recleaning shoe with separate fans.

A further object of the present invention is to provide a closed tail gate for the shaker shoe and adjustable means on the rear end of the grain pan whereby adjustments can easily be made for flax, wheat, oats, barley and lighter grains and whereby grain cannot be blown out of the lower or recleaning compartment.

A still further object of my invention is to provide a chaffer sieve which may be nearly level whereby the blast of air as determined by an air directing valve will readily move the chaff to the discharge end of the shoe whereby any type of sieve may be used, either round holes, wire screen, lip sieves or sieves with a saw tooth section.

A particular object of my invention is to provide a shoe having a tail gate which can be opened or moved out of msition for changing pans and sieves but being in a position to act in a manner which will prevent the loss of grain and insure the return of all of the tailings to the tailings conveyor and all clean grain to the clean grain conveyor.

Shaker shoes have been in use on threshers for many years. On many threshers, two shoes and two fans are used. In any event, the problem of separating the clean grain from the chaff and tailings is an intricate and difficult matter, par ticularly if high efficiency is desired. For example, as near as possible, it is desired that 100% of the grain be cleaned and delivered to the bin and that no clean grain be left mixed with the tailings or lost and that all of the tailings are returned to the thresher cylinder. The problem seems more difiicult when it is realized that combines and, threshing machines are generally operated by men that are not skilled in the art and that the more adjustments provided, the more difiicult it is to secure maximum results.

In my device, I accomplish the desired results, even in the hands of unskilled help largely because of its simplicity. I have therefore limited the device to two major adjustments, each of which are easily understood by the operator and by providing parts which are not sensitive; that is, the device will give maximum results even though the adjustments are not minutely correct.

To these and other useful ends, my invention consists of parts, combinations of parts, or their equivalents, and mode of operation, as hereinafter set forth and claimed and shown in the accompanying drawing in which:

Fig. 1 illustrates fractionally a threshing machine equipped with my invention.

Reference character A designates the cylinder in its entirety. B designates the straw walkers and their grain moving pans in their entireties. The blower fan is designated. in its entirety by reference character C. The shaker shoe is designated in its entirety by reference character D.

Cylinder A is provided with a concave l0 and means for feeding the grain into the cylinder and over the concave which generally includes a threshing elevator I l, a guide plate l2 and a beater l3.

Member B comprises conventional straw walkers It, each pair being preferably equipped with a walker pan l5 shaped about as shown so the chaff and grain are delivered forwardly and fall by gravity on shaker shoe pan l6. This pan is preferably saw toothed and about the length shown and mounted on the shaker shoe so the grain and chaff will fall on its forward end from concave i ll and members l5 by gravity.

Member 15 need not be angled because the saw teeth will act to move the grain and chafi rearwardly and the oscillating movement will shake the grain to the bottom and the chaff to the top as it passes rearwardly and before falling on chaffer sieve 20; thus the grain and chaff is already separated when it reaches the rear end of member It. The chaff being in rear of the grain as it falls to member 2%, the wind blast will carry the chaff completely out of the machine and away from the grain which will go through the chaifer sieve without obstruction.

Blower fan C comprises a shaft 2! and a suitable structure adapted to carry plates 22 and is caused to turn in the direction indicated by curvilinear arrow [9. The outlet of the fan is formed by means of an upper plate 23 and a lower plate 24. Plate 23 is preferably turned upwardly at its rear end as at 25.

Member D is provided with a grain pan 26, the forward end terminating as at 21, the rear end having an extension 28 which is made longitudinally adjustable on member 26 and held in the adjusted position by means of bolts 29. Member 23 is turned upwardly at its rear end as at 33.

preferably as at 31. A guide plate 38 is preferably provided having a short vertically arranged portion 39 and having an upturned rear side 34. This member acts as a receiver for the grain and chaff from member 26, the upturned edge 34 acting tO-SQPZJLGJQG the grain and chaff .as it .falls on member 35.

Directly in front of member 39, I pivot a gate valve 40 as at 4|, the valve being provided with a rearwardly extending portion 42 which terminates as illustrated on a horizontal'line with the bottom of member 35. The side panels of the member D are provided withs'lots 45 and looking means 46 for the valve is provided whereby the front end of this member may be raised and lowered so as to divert more 'or less air over or below members 26 and 35. I have shown valve 40 in its lowest position by means of dotted lines.

Adjacent the'bo't'tom of *the shaker-shoe, I provide a grain gathering trough 50 having an-auger conveyor for conveying the grain to the side of the thresl'ier where it may be elevated to the grainb'in.

A tailings pan 52 is provided having an auger conveyor '53 adapted to conveythetailings to the outside of the thresher housing from whence they may be elevated and delivered to a suitable distributing means above member A'as is the custom in threshing machines. The rear 'endo'f the shaker shoe is provided with an end gate 54,

the upper end 55 of which is substantially vertical terminating as at 56. Member 55 is positioned 'a short distarrcein rear of member 30 when member 30 is in its rearmost position as indicated by dotted lines, leavingan opening 5'! through which the portion :of the blast of :air passing under valve 49 will be 'vpermitted to escape by moving :vertically as indicated byarrow'M.

Tailings gate 54 is provided with a plate 58 terininatingat its :forward end as at 59 small .of the tailings collected will F198 fed into pan 52. A pan 59 is secured to the shaker $1106 at its :rear-en'd as at '6 directly under ,and slightly in front .of the :rear end of member .3 5 terminating at its for- 'wardtend asrat fiZ.

It will be seen that'allrof the :clean grain which falls through dressing sieve 35 will "he .delivered to the clean grain "trough :50. All of the tailings gathered by the rear lend-gatewill be :delivered to trough =52 -by;plate =58.

Tailings gate 54 and .its member 55 are removablyatta'ch'ed (not shown) to the shaker rsh'oe so members 20,, 126 and 35 may "be conveniently removedran'd replaceddrawer-like. fMember=54:may for convenience, bezhinged aszat 63havinglocking means (not shown) :at its upper end so it may be moved out of the way for this purpose or the tailings :gate may be removed :entirely :for .the purpose.

In my design, members 16,10,126, 35, I38 and :60 are necessarily mounted :on member -D.. Valve 40 and its connecting parts may be mounted on member D :as already described; however :this valve may be mounted 'on the side panels of the thresher housing, room being provided between .members 35, .39 and JH torthet'movement of the shaker shoe. In either event, the operation'of the device will be the .same. Members B, as is the custom in conventional threshers, are given oscillating and circular movement by means v(not shown) which is too well knowntorequire further description. The exact shape of the sides of shaker .shoe .D and the means tor oscillating the shoe (not shown) :are too well known to require illustration-pr description.

It will be seen that an air blast will be directed over valve 40 as indicated by double pointed arrows and that the air blast under valve 40 will travel as indicated by single pointed arrows; thus to separate the grain from the chaff and catch all of the .tailings.

,It will be understood that :the major part of the chafl. and grain will be directed to the forward end of member l6 and that the lighter chaff and perhaps some of the grain not separated from thechaiflmay fall directly on member I 6 through opening I! .in member I5; thus the major part of the grain and chaff will not be seriously in- ,fluenced .by the lighter and smaller portion of the chafl' which is released at H.

Clearly many minor detail changes may be made without departing from the spirit and scope of the present invention as recited in the aprpended claims.

Having thus shown and described my invention, Iclaim:

.1. A threshing machine grain separatorof the class described, comprising .'a blower tan having an outlet at the rear thereof, a shaker pan :above said fan with its rear end substantially .in vertical alignment with said outlet, a chaffer sieve in rear of said shaker pan adapted :at its front end to receive thegrain and :chaif by gravity ifrom the rear end 'of thelshaker pane grain pan Joelow said chaiier sieve with its rear 'end a :short distance below and in rear of the rear end of said chaifer sieve :and extending forwardly (and downwardly with its front end terminating a short distance in rear of said outlet and substantially .midway vertically thereof, a dressing sieve positioned under .said grain pan with its rear end a distance below the :rear :end of the grain pan and .its front end a short distance be- :low and in front of the front end of the grain pan, :a gate valve hingedly mounted .at :its :rear corners adjacent the front end 'of said dressing sieve and :having :means for manual adjustment to thereby optionally deliver more or less 'air from the fanra'bove and below-saidjgrain panand dressing sieve, a rear end-gate the upper ,portion being 12L distance .in .rear -.of said grain :pan, the upper edge terminating a distance :above the horizontal plane of the rear :end of the grain pan, a tailings :trough having a conveyor and means associated with .said end-gate adapted to deliver the tailings into the ltailings trough, :a grain trough having a conveyor and positioned between said outlet and tailings trough, another grain .pan, the .rear end positioned adjacent the rear end -.of saiddressing sieve and extending =forwardly and downwardly into said grain trough.

,2. .A device as recited in claim .lincluding; a relatively narrow gathering :element positioned on the front end -of said tdressing "sieve. havin means whereby the grainand-chaif are received and distributed over the dressing sieve.

.3. A device as recited :in claim 1 including: said gate valve being wery :narrow at its .front edge and .having considerable width :at its rear edge and being positioned whereby the airis de- :lated .rmanually.

ZEHOMAS CARROLL. 

